Question 1

A carbon-hydrogen bond in ethane (CH3CH3) is best described a ________.

Accepted Answer

A)  highly polar 
B)  essentially nonpolar 
C)  ionic 
D)  a multiple bond 
E)  resonance stabilized 
A)  highly polar 
B)  essentially nonpolar 
C)  ionic 
D)  a multiple bond 
E)  resonance stabilized

Question 2

The atomic number of boron is 5. The correct electronic configuration of boron is:

Accepted Answer

A)  1s22s3 
B)  1s22p3 
C)  1s22s22p1 
D)  2s22p3 
E)  1s22s23s1 
A)  1s22s3 
B)  1s22p3 
C)  1s22s22p1 
D)  2s22p3 
E)  1s22s23s1

Question 3

Draw an acceptable line-angle formula for the compound shown below.

Accepted Answer

The answer of Draw an acceptable line-angle formula for the...

Question 4

Write a Lewis structure for a compound with the molecular formula H2N2.

Accepted Answer

Question 5

Orbitals which are equal in energy are referred to as ________.

Accepted Answer

A)  degenerate 
B)  polar 
C)  nodes 
D)  filled 
E)  nonpolar 
A)  degenerate 
B)  polar 
C)  nodes 
D)  filled 
E)  nonpolar

Question 6

Which element in the second row of the periodic table has six valence electrons and a valence of two?

Accepted Answer

The answer of Which element in the second row of...

Question 7

Which sequence ranks the indicated protons in order of increasing acidity?

Accepted Answer

A)  1<2<3 
B)  2<1<3 
C)  1<3<2 
D)  3<2<1 
A)  1<2<3 
B)  2<1<3 
C)  1<3<2 
D)  3<2<1

Question 8

How many distinct p orbitals exist in the second electron shell, where n = 2?

Accepted Answer

A)  2 
B)  3 
C)  4 
D)  5 
E)  6 
A)  2 
B)  3 
C)  4 
D)  5 
E)  6

Question 9

Methanol has a pKa of 15.5. Calculate its Ka.

Accepted Answer

The answer of Methanol has a pKa of 15.5. Calculate...

Question 10

Provide the electron configuration of phosphorus.

Accepted Answer

The answer of Provide the electron configuration of phosphorus....

Question 11

Rank the following compounds in order of increasing basicity: CH3O-, H2N-, H2O, and NH3.

Accepted Answer

Question 12

Which of the following terms comes closest to describing an electrophile?

Accepted Answer

A)  anion 
B)  Lewis base 
C)  Lewis acid 
D)  nucleophile 
E)  nonpolar 
A)  anion 
B)  Lewis base 
C)  Lewis acid 
D)  nucleophile 
E)  nonpolar

Question 13

Atoms with the same number of protons but different numbers of neutrons are called ________.

Accepted Answer

The answer of Atoms with the same number of protons...

Question 14

In the reaction below, label each reactant as a nucleophile or an electrophile.
CH3COO- + O2S(OCH3)2 → CH3COOCH3 + CH3SO4-

Accepted Answer

CH₃COO^-,

Question 15

Draw the Lewis structure of acetic acid, CH3CO2H.

Accepted Answer

Question 16

The formal charge on nitrogen in the compound below is ________.

Accepted Answer

A)  +2 
B)  +1 
C)  0 
D)  -1 
E)  -2 
A)  +2 
B)  +1 
C)  0 
D)  -1 
E)  -2

Question 17

The conjugate acid of ammonia, NH3, is ________.

Accepted Answer

A)  NH2- 
B)  NH2OH 
C)  NH4+ 
D)  none of the above 
A)  NH2- 
B)  NH2OH 
C)  NH4+ 
D)  none of the above

Question 18

In the reaction below, label each reactant as a nucleophile or an electrophile.

Accepted Answer

BH₃, electr

Question 19

Draw the Lewis structure for 2-butanol, CH3CH(OH)CH2CH3.

Accepted Answer

Question 20

Provide the line-angle formula (skeletal structure) for (CH3)2CHCH2CHO.

Accepted Answer

Exam 1: Introduction and Review

A carbon-hydrogen bond in ethane (CH3CH3) is best described a ________.

The atomic number of boron is 5. The correct electronic configuration of boron is:

Draw an acceptable line-angle formula for the compound shown below.

Write a Lewis structure for a compound with the molecular formula H2N2.

Orbitals which are equal in energy are referred to as ________.

Which element in the second row of the periodic table has six valence electrons and a valence of two?

Which sequence ranks the indicated protons in order of increasing acidity?

How many distinct p orbitals exist in the second electron shell, where n = 2?

Methanol has a pKa of 15.5. Calculate its Ka.

Provide the electron configuration of phosphorus.

Rank the following compounds in order of increasing basicity: CH3O-, H2N-, H2O, and NH3.

Which of the following terms comes closest to describing an electrophile?

Atoms with the same number of protons but different numbers of neutrons are called ________.

In the reaction below, label each reactant as a nucleophile or an electrophile. CH3COO- + O2S(OCH3)2 → CH3COOCH3 + CH3SO4-

Draw the Lewis structure of acetic acid, CH3CO2H.

The formal charge on nitrogen in the compound below is ________.

The conjugate acid of ammonia, NH3, is ________.

In the reaction below, label each reactant as a nucleophile or an electrophile.

Draw the Lewis structure for 2-butanol, CH3CH(OH)CH2CH3.

Provide the line-angle formula (skeletal structure) for (CH3)2CHCH2CHO.

Structure and Properties of Organic Molecules

Structure and Stereochemistry of Alkanes

The Study of Chemical Reactions

Stereochemistry

Alkyl Halides: Nucleophilic Substitution and Elimination

Structure and Synthesis of Alkenes

Reactions of Alkenes

Alkynes

Structure and Synthesis of Alcohols

Reactions of Alcohols

Infrared Spectroscopy and Mass Spectrometry

Nuclear Magnetic Resonance Spectroscopy

Ethers, Epoxides, and Thioethers

Conjugated Systems, Orbital Symmetry, and Ultraviolet Spectroscopy

Aromatic Compounds

Reactions of Aromatic Compounds

Ketones and Aldehydes

Amines

Carboxylic Acids

Carboxylic Acid Derivatives

Condensations and Alpha Substitutions of Carboxyl Compounds

Carbohydrates and Nucleic Acids

Amino Acids, Peptides, and Proteins

Lipids

Synthetic Polymers

Filters

A carbon-hydrogen bond in ethane (CH₃CH₃) is best described a ________.

Write a Lewis structure for a compound with the molecular formula H₂N₂.

Rank the following compounds in order of increasing basicity: CH₃O^-, H₂N^-, H₂O, and NH₃.

In the reaction below, label each reactant as a nucleophile or an electrophile. CH₃COO^- + O₂S(OCH₃)₂ → CH₃COOCH₃ + CH₃SO₄^-

Draw the Lewis structure of acetic acid, CH₃CO₂H.

The conjugate acid of ammonia, NH₃, is ________.

Draw the Lewis structure for 2-butanol, CH₃CH(OH)CH₂CH₃.

Provide the line-angle formula (skeletal structure) for (CH₃)₂CHCH₂CHO.